Milling-machine.



B. M. WLHANSON.

MILLING MACHINE. APPLICATION -mEo 001.9, |914.

Patented Mar. 28, 191e 3 surety-Susu nyzff.

.A /z /0 lvesses: Invenr:

2;? JZMIKHW'MM B. M; W- HA'NSUN.

MILLING M'A'GHINE.

APPucATloN min 061.9. 1914.

1,177,569. Patented Mar. 28, 1916.

3 SHEETS-SHEEI 2.

jwtivj KMN@ s. M. w.- H'ANsoN.

MILLING MACHINE. APPuc/ulon mw ocT.9.1914.

Patnted Mar. 28,1916.

3 SHEETS-SHE'ET l3.

, new and useful Improvements' in Milling-V 'the work, to react byv resiliency,

UNTED STATES PATENT oniricaviaENciT M. w.- miNsoN, or marroni, coNNiac'rIcU'r.

MILLING-MACHINE. y

To all whom it may concern:

Be itknown that I, BENGT M. W. HAN- soN, a citizen of the UnitedStates, residing at Hartford, in the county of Hartford and State of Connecticut, 4have invented certain Machines, of which ication.

This invention chines. o I

While the improvements arev of prime utility when incorporated in a milling machine, it is obvious that'they can be with equal` advantage, utilized in conjunction with other kinds of metal working machines such for example'as shapers and planers.`

One of the principal objects of the invention is the provision of means of ay simple and effective character by which the milling tool can be caused relatively to pass .free or out of contact with the work approximately at the, conclusion of a cutting operation, and as a matter of preference to be maintained in such relation until a second cut is to be made, by virtue of which the tool cannot mar or deface the work or surface which has been previously cut. In a milling-machine there is a tendency at the conclusion 'of a milling operation by the tool, when free of and in this the following is a specirelates .i yto l milling-maevent the work at time is seriously affected.

, and 1a are collectively a By -virtue of my invention, this disadvantage is eliminated.

The invention possesses other features of novelty and advantage, which with thefore'- going ing description, wherein I will set forth in detail that one of the many different forms l of embodiment of theinvention which I have selected for illustration in the drawings accompanying and forming part of the present specification. I do not restrict myself to this disclosure; I may depart therefrom in radical respects Within the scope of the invention defined by the claims following saidv description.

Referring to said drawings, Figures -1 side elevation of a milling-machine involving my invention,

Fig. l*l being part of the rod represented in Specification of Letters Patent.

. the work carriage,

will be stated at length in the follow-A throughoutthe several views of the drawings, which are on different scales.

A In a machine linvolving` my invention there is preferably a tool and a work-car'- riage, means for advancing and retracting the tool beiifg positioned to cut the work during the advancing vmovement of the carriage, andmeans for causing -relative lateral' separating movement of the tool and the work approximately at the 'conclusiori of the cutting operation; byI lateral movement as will be inferred, I mean inotion in a direction transverse to the cutting plane or the line of travel of the carirage.

Patented Mag. 28,1916. Application filedvoctober 9, 1914. A, Serial No. $645,856.

ofdthe workf supporting device and adjuncts.

As a matter of preference this separation oflv the tool andthe work is maintained preferably positively until about the time a second cut is commenced.

The machine also comprises in its-organization a work-carriage such for instance-as a slide, provided with rigid bearing means,

a work-supportingmember, means for pressing the work-supporting member against the bearing means during the cutting operation at which time it may be assumed Hthe work carriage i's .being advanced, and-for. causing the work support to move awayfrom the bearing means on or during the return or retractvive movement of the carriage at which point the tool is wholly out of Contact with the work. As will be understood I do not restrict myself to any particular means for obtaining this relative lateral separation of the tool and the work, althoughas may be understood from the ystatements already made, the best effects are obtained by a movement of the work as is represented in the organization shown in the drawings to also note that the construction is such that the ii urk is non-yieldingly and substantially held hv a structure which may be virtually "ered as integral.

the foregoing general observations I will now describe fully the particular showing made by said drawings The various parts of the machine may be supported by any suitable framework; that shown for the purpose comprises the base or bed 2. This bed 2 has ways for supporting a work Carriage which as shown consists of a slide 3. From the upper side ot' and suitably fastened to the base the head stock 4 rises, beingpri; 'ided with. a slide 5 adjustable by the hand wheel and furnished with the si'nlo 7 to which the arbor 8 of the f f he detachablif connected.

liking is a emi-:iss description of nii iiiig-nniciiine which is more or less eomnion.

in my impending application tiled October er rai 'Ling' to receive the iflepending stud l o. e worlerarrier or recipriwatery slide S. thi s, r ce or eazniiay 2L being' shaped to iniiigrt through the stud 133 a complete re- (tip: ation to the work-carriage or slide?, on each complete rotation ot' the cam roller or drinn 10 and which is one of several ooniienient mechanisms for reciiirocating a work -ca Prier. lnringj the vatting or milling operation the work is, ot course. in its elevated position, the carriage or slide being advanced slowly during sach operation. At the conclusion oi a cut the work is receded or dropped and the return movement of the earriagi-i whiclii occurs at or subsequent to the milling or .:utting operation is a rapid l *wing to the fasi, that the iio is i carriage or sl le van be a'zipidly reti., l. or bi1 givin a quick return nioverfff .itiI and ie outtinlrj too-l raniiot mar or deiaee the work eren though thi. tool be rotating:i which il might note, is an important feature. As ainatter of iact 1 am the first. so iar as l know. in :i milling machine to diari #lue work free ol: the `tool at the conclu, ion oi', a cut and return the carriage or slide at oi' not at an accelerated rate of speed While the cutting tool is rotating. In conjunction with said work carriage 3 there is a w( ksnpporting device of suitable construction. the tivo being associated 1n any desirali-e manner. work-supiiiorting device suen as that dented in a general way by t and shown in detail in Fig answers iny requirements. Whi e' this 'ii'tirli-snpimrting dei'ice 14 might be rigid or integral with the Work-carriage or slide 3, I prefer that 1t be adjustable thereon as will hereinafter ap- Dear. Said work-supporting device as represented comprises three principal elements 6 as 15, 16 and i7. the part 15 constituting a base. the part 1G an actuating member7 and v the lpart 1i' a work-supporting member. As shown the base lo' has at oppositil sides the flanges 18 and lil disposed in parallelism and 7 between which the actuating member 143 and the work-siipporting member li" are con- Imed. As illustrated the .space between the side walls or flanges 19% and 119 is bridged by the plates 20 and 21, the two plates and tivo .7 flanges iiresenting a practically rertangular frame and being rmli,v secured together in some desirable mannerE tor instance by screws extending through perforations near the ends of the plates and tapped into 8 the ends ot' said flanges. The side edges of the aotiiatiiig member 16 and the work siii porting member 1T engage it all times the inner surfaces ot the o sdo i'langes and 19, the ends of the, 'worksupporting' 8 member 1T l'iearingV against the inner snrfaces of the Atwo transi erse plates i0 and il as shown respectively in lfigs. il and Ll. he length of the operating"member iii is less, however, than the inside distance between 9 the plates 2O and l1 to permit movement ot' the actuating membeil longitudinally of the base member 13.r for a purpose that will hereinafter appear.

Owing to the engagement between the 9 ends of the ivorlvsuppiirting member 1i" and the platre 3f/l and 2la it will be clear that said memiau cannot more hingitudinallti as it may be raised or lowered. As shofvi the plates 2() and 2i. are provided at their boitom with outwardly extending lugs or' ears 23 slotted as at 2J( to rec-civili the bolts 2.3 which are adapted to enter the intermediate of the throJ T-slots Q6 ente: fing .longitudinally oi" the work carriage il. the :luis oi' the l bolts when set securely ela wiping the work siii'iiii'irtingj device in its adjusted position. By loosening the nuts ihr or; supporting devine 1i nay be adjusted iongitialinally of the work carriage il. and when the adjustl nient secured said nais ii ill be While in some cases the work mio' 4 be ilirei-tliv mounted upon the work-suivport' r member 1T, 1 have not shown this condition in the drawings, the work being clamped or oth- 1 erwise suitably connected. 'with a fixture as Q8 which in turn is conveniently connected with the work :iuiiiporting meii'iber 17 as by one or more bolts so that the work 2T is thus rigidly connected. with the worl -sup- 1 portii'ig member 1T, .it following that the. work partakes of the ii'iotion Il? siid element 17.v As represented the actuating member 16 is interposed het Weeny the naze 15 and theg Work supporting member 1T the latter ln the 1 organization shown being capable of solely perpendicular movement with respect to the base 15, means being provided as already described to prevent any other movement which is advantageous though not essential, as I have already intimated. The effect of the actuatingmember 16 can be applied to the work supporting member )'7 in some suitable manner'. for instance by cam or wedge means, the engaging faces of the two lparts being of wedge shape and being divided into steps. By virtue of this division (two steps being shown), I can make the pitchof the ,wedge sufficiently steep to se cure the requisite lifting power. When the wedge operating element 16 is slid to the left in Fig. 4 it follows that the work-supporting member 17 and hence the work 27 will be raised whereas when Said element 16 is slid toward the right, the work-supporting memberwill be caused to lower the work walls 18 and 19 respectively, answer satisfactorily iii this respect, these flanges extending inward from the side walls 18 and being practically coextensive therewith. The upper wedge element or work supporting member 17 has the laterally extending ledges 32 and 33 which 'are adapted to be impinged against these inwardly extending flanges 30 and 31 respectively approximately i at or before the commencement of a cut lconstitute a 'convenient means for resisting thereby t0 rigidly and substantially clamp the work supporting member 17 in its ele` vated position, downward thrust being resisted by the wedge 16 and base 15, so that there is practically solid stock between the work-supporting member 17 and the basel 15 to therebv prevent chattering or vibration. It will be cle-ar that said ledges'BO and 31,

reactive thrusts of the work during the time Y the latter is being milled. While in the or# ganization shown said reactive thrusts are upward or vertical, this may not always be the case. A

In the organization shown the work-supporting member 17 is elevated partly across the cutting plane at about or just before the commencement of a cut so that the last mentioiied function can be obtained and is lowered at practically or after completion of a cut, so that the work is moved partly below` the cutting plane, the latter relation being maintained untila vsecond cut is to be made and slightly before this latter point the part 17 is'again elevated, and this condition is lfcontinued until the second cut has been, fin- `rislied, it being evident that the work follows satisfactory.

virtually a rectangular orbital path, the

work wholly clearing the teeth of the milling cutter on the backward or retractive movement of the slide. The lwork-supporting member 17 is shown provided with pins 34 rigid therewith and which extend freely into openings 35 in the operating member 16. As illustrated the-Shanks of these-pins can be driven Ainto openings 36 in .the con xiecting surface between the steps of said work-supporting member, while the openings or countcrbores 35'can be formed in the 'corresponding surface 37 of the actuating member 16, the'free ends of said pins as shown, bearing against the upper portions of the counterbnres 35 but not against the 80 lower portions thereof. The plates 20 and 21 may b e provided with -practically similar pins 38 extending freely into countenbores 39 in the ends of the operating membei` 16,

the free portions of the pins 38however, 85

bearing against the lower parts of the counterbores 39. This construction provides for maintaining the two parts 16 and 17 in `pai'- allel relation and also in holding the part 16 against its seat without in any wise effecting free movement back and forth of said actuating member 16. Said actuating member is shown as being in itsoperative. position in Fig. 4.- at which time there is a space or" interval between the surfaces 36 and 37. By 95 movingthe part 16 to the right in Fig. 4 the work-supportingmember 17 will be caused to lower the surface 37 approaching the opening 36. Ido not rely upon gravity to cause the downward movement of theA part 17, the latter being positively drawn down by the inclined pins .34 as the actuating member moves to the right in Fig. 4. On movement of the part 16 to the left, the

companion member 17 will be elevated and 105,

the' ledges or projections 32 and 33 pressed respectively'against the flanges 30 and 31. From whathas been noted it will be clear that in the construction shown the member 17 is elevated before the cutting or milling 110 operation and is lowered at or after such an. operation, these' functions being alternately obtained by the movement ofthe wedge 16 with respect to the base 15 and the means shown whereby this is accomplished is quite In the bottom of the operating member 16 near the forward side thereof is the chamber or cavity 40 open on one side and in which is mounted an operating-member, 126

open side of said chamber 40 and its teeth 125 being in mesh with those of the rack 43, the laterally extended portion 44 of the wall 19' l,

having a socket 45 to slidingly receive said y rack which is'shiftable as will hereinafter appear With respect to the Work-supporting device 14. The toe portion 46 of the relatively oscillatory sector 4l is cooperative with the stud 47 rigid with the actuating member A'16, said stud 47 being situated in the chamber 40 alluded to. The heel 4S of the sector'coacts with a bearing shown as adjustable and which may consist ofthe member 49 pivoted as at 50 to the actuating member or wedge 16 in said chamber 40.

The surface of the heel 48 which engagesV the Vabutment surface 51 is preferably on an arc struck from the center of motion of the oscilla'tory section 40. To adjust the bearing member 49 for instance to take up wear, the

A, The outer end of the bore 53 is normally closed by the plug -54 by removing whichA access may be had to the screw 52 to effect,`A

screw 52 may be provided, said screw being tapped into the forward reduced portion of the bore 53 extending obliquely of the actuating member 1G, it being evident that-thc adjusting screw 52 is also obliquely disposed.

the adjustment of the pivoted bearing inein- `ber 49. The rack'43 as shown is provided with an extension in the forni of a rod 55 provided with projections 5G and' 57 thereon shown as adjustable collars, said rod 55 extending through the slot 58 of the actuator 59, the shank of Whichfcan'be fastened suitably as by screws to the back of -tlie head stock 4, the collars 5G and 57 being situated on opposite sides of the stationary actu-v ator 59. 0

In Fig. 1 where the p'rincipal parts of the machine are shown the work carriage on its advance moves Atoward the right, the oppo- .site or retractive stroke being toward the left. In Figs, 3 and 4 the actuating member V16 is shown in its operative position, having wlienmoved to such position raised the work K supporting member and hence the work 27 associated therewith. It will be understood that when the carriage 3 moves to the right the Work supporting device 14 is correspond-..

` and about which point the work carriage ,3

is to be reversed, the collar 56 will strike the actuator 59, so thaton the sli glit. furtheradvancing movement of the carriage 3 the movement of the rod 55 will b e arrested and said rod and rack 43 will be relativel v speaking thrust to the left in Fig. 3. thereln cansing the sector 41 to rock and the toe 4G thereof to engage the stud 47 and hence moving the vredgc 16 relativelvto the right in Figs. 3 and 4. As a matter of fact the movement oit the Wedge 16 is arrested, the movement 'l"ig\ 3, so that the rack by acting against being a relative one as will be inferred. On such relative movement the Wedgeor actuating lmember 16 draws the work supporting member 17 downward thereby moving the work 27 'away froni'thehcutter 9. iVhen the I work isr lowered or at'flabout lthis'time the carriage 3.is reversed and is returned to its initial position, all by the cam 10 i in the f manner described. Just before the Work carriage 3 reaches its initial position, the f work 27 being down on thev return stroke, the collar57 will strike the actuator 59 so that on the .slight further retractive movement of the work carriage the collar 57 will strike the actuator'59 and thereby relatively move the rod 55 and rack 43 to the right in the bearing member 49 can relatively move` the wedge 16 to the left in Figs. g3 and 4 so as to effect the elevation of the Wedge 17. and thel abutment of its ledges 32 and 33 against theflanges 30 and 31, this action being concluded at about'the time the return movement of theI work carriage 3 sliould commence. lVlien the wedge 16 is moved to the left in said Figs. 3 and 4 the woi'k supporting member 17 and the/:parts mounted thereon including'tlie work Q7 arejelevated and the elevated relation will be maintained until the collai` 56 strikesthe actuator'59 at about the conclusion of the advancing movement of the work carriage 3 at which point the described operation will be repeated.

i As maybe inferred. the invention involves certain broad principles. one ofltliem the movement of the work toward and from the milling cutter automatically practically before and at the conclusion ,of a cut respectively. ,In the sliowii'igmade the movement ofthe work from the slide is upward. so that' the work is caused to partially cross the cutting plane of the cutter to position the work to be milled., At the conclusion of the cut or practically tl'iereat. the work is moved partially below the cutting plane. so that as the carriage oi: slide travels backward. there is no possibility ofthe work `being injured b v thc cutter, not\ vitlistanding the fact that the cutter is rotating. This is a most imv portant considcratioi'i and so far as I am aware hasiiever been done in a milling' niachine. It is a matter of great importance that the thrust of the tool against the worlc should lieetfectually resisted to eliininatfl chattering and hence obtain excellence or' vProduct. There are two thrusts to be resisted; and these are transverse to each other. beingr in the present case approxiinatcly at right angles to each other. the resultant being on a line between the other two-lincsof thrust. .lu the organization shown there is a doivnw lthrust and a bach thrust during cutting. tac resultant heilig alongr a dhie'onai line betueen the horizontal and xenical lines of thrust. Various means may be provided for resisting these thrusts during the cutting action. The slirlahle wedge member 1G resists the down thrust and the wall 2l against which the upper slidahle member 17 has a constant bearing engagement resists the back thrust. Tere the work carried by a pivotal support, thc pivot of the said pivotal support would resist the back thrust, while a slidable wedge or some equivalent element inter Osed between the support 17 and the slide` would resist the down thrust. IvVhile as Ibserve it is practically imperative that these thrusts should be resisted, I do not wish to restrict myself, there being no necessity for doing so, to an organization comprising such means. By resisting the two thrusts thev work will be held substantially against the cutting tool during the milling operation.

What I claim iS:

1, In a metal working machine the combination of a slide, means for automatically advancing and retracting the slide, a cutting tool in coperative relation with said slide, Work supporting means on the slide, the tool acting to cut the work during the advance of the slide, and means for moving the work in a direction away from the slide and Sulliciently across the cutting plane of the tool vbefore the Work reaches the tool to position the Work to be cut as the slide advances, for

maintaining a substantially solid unbroken support between the slide and the work-carrying means to thereby form a non-yielding base Vor support to resist thrusts upon the work, and for moving the work away from thecutting plane after the cut has been made to free the work from the tool as the slide is retracted.

2. In a metal working machine the combination of a slide, means for advancing and retracting the slide, a cutting tool in coper# ative relation with said slide, work supporting means on the slide, the tool acting to cut the Work during the advance of the slide, and means for moving the Work in a direction-away from the slide and suiciently across the cutting plane of the tool before the Work reaches the tool to position the Work to be cut as the slide advances, for maintaining a vsubstantially solid unbroken -support between the slide and the work-carrying means to thereby form a non-yielding base or support to resist thrusts upon the Work, and for moving the work away from the cutting plane after thecut has been made to'free the work from the tool as the slide is retracted, and means for resisting reactive thrusts-of the work.

3. In a metal working machine, the combination of a slide, a work-holder thereon, a cutting tool in operative relation to the path of said slide, means for reciprocating said slide,imeans for adjusting said workholder toward and from the cutting plane ofsaid tool comprising a member interposed De-v tween the lower and upper surfaces of saidA holder and Said slide respectively, andv shaped to cause a 'nfA of said slide, means for reciprocating said slide, an adjustable supporting member .inl terposed between said sl-ide and said`workholder having bearing surfaces coacting with work-holder to cause a. separation or recession thereof when moved bodily therebetween, and means for automatically moving said member bodily in alternate directions on each reciprocation of the slide.A v A 5. In a metal Working machine, the combination of a reciprocatory slide, a Werlisupporting member on the carriage, a slid-A able wedge for governing the wprk supporting member, and automatically operative mechanism for sliding` said wedge to cause the same to elevate the work supporting member on the advancing mevement of thev A carriage and to effect lowering of the work supportingr member on Ythe opposite movement of said carriage.

,7. In a machine of the class described,

l the combination of areciprocatory carriage,

a pair of engaging` wedges, one of which constitutes a Work supporting membenand mechanism for automatically operating the other wedge at predetermined points in the advance and retraction of the carriage t0 raise and lower respectively the'work supportingwedge. l

8. In a machine of the'classdescribed,

the combination of a reciprocatory carriage,

a pairofengagingwedgesone of'which'constitutes a work supporting member. mechanism for automatically operating the other wedge at predeterminedpoints in the ad: vance and retraction of the carriage to raise and lower respectivelv the work supporting wedge, and fixed means, connected with -the Y so i the engaging surfaces ofthe slide and the carriage against, which the work suppl-gating.

wedge engages when in its elevated position.

Si'. In a machine of the class described. the combination of a reciprocatorv carriagei a hase connected with the carriage. a wedge slidable on the base. said wedge having` a stud'and a bearing'. a pivol'allv moan-Led sector. the wedge having a chamber to receive the .stud and the bearing. the chamber beine open and the sector projecting from the open side of the chamber, a rack. the teeth of which are in mesh with those of the. sector, the rack being` equipped with a rod having projections. a fixture to alternatel) engage the projection tol eii'ect the movement oi the rod and rack and thereby opposite movements of the sector.v whereby the sector will engage said stud and bearing to move said wedge in opposite directions, and a second wedge positioned to be raised and lowered-:by the first wedge.

10. In a machine of the class described,

the combination of a work carriage provided with side walls having overhanging flanges. a member tted between the said walls fiat on its under side and wedgeshaped on its upper side. a second member wedgeshaped on its under side to engage the corresponding surface of the first member, the second member having outwardly extending ledges and the walls having inwardly extending flanges. and means for sliding the {irst member automatically back and forward on the base to cause the same to raise and lower the second member, the ledges ot' the. second member when raised being mpiuged against said-flanges.

11. In a' metal working machine. the combination et a slide. a work-holder thereon, a cutting tool in operative relation to the path of said slide. means for reciprocating said slide. an adjustable wedge-shaped member carried by said slide to engage a supporting sin-'tace of said work-holder, and means for bodily .moving said member to cause a relative movement between said member and supporting surfaces and thereb v effect a separation or approach between the slide and the work-holder.

12. In a metal working machine, the eombinatien of a slide, a work-holder thereon. a cuttingr tool. means for reciprocatingr said slide inoperative relation to said tool, a member interposed between'said slide and said workholder, having bearing surfaces in engagcn'icnt with the lower surface of said' holder and with the upper surface of 13. In a metal working machine the comlunation ot' a slide, means for advancing and retracting the slide, work supporting means on the slide. means for causing the increment of the. work awav from the slide and-then toward the slide and for also non- .vieldingly supporting the work when in a position awav from the slide, and fixed means for resisting reactive thrusts of the work during the time. it is away from the slide.

ll. The combination of a slidable meinber. a pivotally mounted gear member movable with said slidable member, a rack, the teeth ot' which are in mesh with those of the gear member, means on the framework for oppositely moving said rack on alternate movements of the slidable member, work supporting means on the slidable member. and means actuated by said gear member for causing opposite movements.

l5. In a metal working machine the combination of a slide. means for automaticallyv advancing and retracting the slide, a rotary milling tool in cooperative relation with said slide, work supporting means on the. slide. the tool acting to mill the work during the advance of the slide, and means for moving the work in a direction away from the slide and sufficiently across the cutting plane of the tool before the work reaches the tool to thereby position the work to be milled as the slide advances, for non- ,vieldingly resisting thrusts appliedby the tool to the work in a direction toward the slide and in a direction toward the rear of the slide during the milling operation, and' for moving the workaway from the cutting plane after the work has been milled to free the work of the teeth of the tool as the slide is retracted.

1G. In a metal working machine, the combination of a slide, means for automatically advancing and retracting the slide, a milling tool in cooperative relation with said slide, work supporting means on the slide, the tool acting to mill the work during the advance of the slide, and means for .moving the. work in a direction away from the slide and suliiciently across the cutting plane of the tool before the work reaches the tool to thus position the work to be milled as the slide advances and for moving the work away from the cutting plane after the cut has been made to free the work from the teeth of the tool as the slide is retracted.

17. In a metal working machine the com- 18. In a metal working machine the combination of a slide, means for reciprocating the slide, means for moving the work away and toward the slide at successive points in the reciprocation thereof and for interposiiig non-yielding resistance between theA work and the slide when the work is in a position away from the slide, and fixed means on the slide to resist reactive thrusts of the work when, the latter is in a position away from the slide.

19. In a machine of the class described, the combination of a reciprocatory slide, a pair of engaging wedges, one of which constitutes a work supporting member, and mechanism for automatically operating the other wedge at predetermined points in the reciprocation of the carriage to cause the raising and lowering of the work supporting wedge.

20. In a machine of the class described the combination of a reciprocatory slide, superimposed wedges, the outer wedge constituting a work supporting member, mechanism for automatically operating the inner wedge in opposite directions at predetermined points in the reciprocation of the slide to cause the outer wedge to move away from and toward the slide, and fixed means connected with the slide and against which the work supporting wedge abuts when in a position away from the slide.

21. In a metal working machine, the combination of a slide, means for reciprocating the slide, a work supporting member on the slide, means for moving the work supporting member away from and toward the slide at predetermined points in the reciprocation of the slide and for non-yieldingly interposing resistance between the work supporting member and the slide when the work supporting member is in a position away from the slide, and fixed means on the slide to be engaged by the work supporting member when the latter is in a position away from the slide.

22. In a machine of the class described, the combination of a slide, means for reciprocating said slide, work supporting means on the slide, and means for moving the work away and then toward the slide at predetermined points in the reciprocation thereof and for non-yieldingly resisting thrusts in opposite directions applied to the work when the latter is in a position away from the slide.

23. In a metal working machine the combination of a reciprocatory slide, inner and outer engaging wedges, the outer Wedge constituting a work supporting member, and mechanism for operating the inner wedge at predetermined points in the reciprocation of the slide to cause the movement of the \outer wedge toward and from the slide, the

inner wedge having means to engage the outer wedge to positively draw the outer wedge toward the slide.

2i. In a machine of theclass described the combination of a slide, work supporting means on the slide, means forautomatically advancing and retracting the slide, a milling tool to mill the work on the slide on the advance thereof, the slide being provided with means for holding the work sufficiently across the cutting plane of the tool to permit the tool to mill the work on the advance of the slide, and automatic means for causing the work to approach the slide at approximately the conclusion of a cut and for also causing the work to free the teeth of the milling tool as the slide is retracted.

Q5. In a metal Working machine the combination of a reciprocatory slide, superimposed wedges supported by the slide, the outer edge constituting the work holding means, a rocking member supported by the slide. elements on the inner wedge, means for imparting movements to the rocking member at diierent points in the reciprocation of the slide to cause said rocking member to alternately engage said elements to thereby effect opposite movements of the in- Y ner wedge and thus to cause movements of the outer wedge toward and from the slide.

2G. Ina metal working machine the combination of a reciprocatory slide, superimposed wedges supported by the slide, the outer edge constituting the work holdingl means, a rocking member supported by the slide, elements on the inner wedge, means for imparting movements to the rocking member at different points in the reciprocation of the slide to cause said rocking member to alternately engage said elements to thereby efect opposite movements of the inner wedge and thus to cause movements of the outer wedge toward and from the slide, one of said elements being adjustable and the slide being equipped with fixed means to be engaged by the outer wedge when the same is in a predetermined position away from the slide.

27. In a metal working machine the combination of a slide, means for advancing and retracting the slide, means for holding the work non-yieldingly in a position away from the slide and for also non-yieldingly preventing reactive movement of the work, a milling tool to mill the work on the advance of the slide, and means for causing the movew ment of the Work automatically toward the slide approximately at the conclusion of a milling operation and for maintaining said relation a sufiicient length of time to prevent the tool marring the Work on the retractive stroke of the slide.

Q8. In a metal working machine the combination of a slide, means for advancing and retracting the slide, a cutting tool in coperative relation with said slide, Work supporting means 0n the slide, the tool acting to cut the Work during the advance -of the slide, and means for moving the work in a direction away from the slide and suficiently across the cutting plane of the tool before the work reaches the tool to position the work to be cut as the slide advances, for maintaining a substantially solid unbroken support between the slide and the Workcarrying means substantially coextensive with the superficial area of the work supporting surface to thereby -form a non-yielding base or support to resist thrusts upon the 15 work, and for moving the Work away from the cutting plane after the cut has been made to free the4 work from the tool as the slide is retracted.

In testimony whereof I affix my signature 20 Witnesses:

W. M. STORRS, C. M. GELLsnT. 

